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                    第一章    初识java
            
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                    2.1  标识符和关键字
            
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                    2.2  变量和常量
            
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                    2.3  Java数据类型
            
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                    2.4  成员变量和局部变量
            
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                    2.5  Java运算符
            
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                    2.6  Java表达式
            
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                    2.7  本章练习
            
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                    第三章    流程控制
            
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                    3.2  switch语句
            
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                    3.3  循环语句
            
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                    3.4  本章练习
            
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                    第四章    方法与数组
            
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                    4.1  方法
            
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                    4.2  数组
            
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                    4.3  二维数组
            
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                    5.1  String类
            
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                    5.2  String类的常用方法
            
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                    5.3  Java API文档的使用
            
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                    5.4  StringBuffer类
            
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                    5.5  本章练习
            
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                    第六章    类和对象
            
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                    6.1  类和对象概述
            
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                    6.2  Java类
            
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                    6.3  构造方法
            
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                    6.4  对象初始化过程
            
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                    6.5  重载
            
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                    6.6  本章练习
            
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                    7.1  Java包
            
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                    7.2  引用包
            
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                    7.3  访问权限
            
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                    7.4  static关键字
            
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                    7.5  本章练习
            
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                    第八章    继承和多态
            
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                    8.1  抽象和封装
            
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                    8.2  继承
            
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                    8.3  多态
            
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                    8.4  本章练习
            
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                    第九章    抽象类和接口
            
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                    9.1  抽象类
            
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                    9.2  接口
            
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                    9.3  本章练习
            
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                    第十章    排序算法
            
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                    10.1  排序算法
            
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                    10.2  本章练习
            
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<h3 id="211--&#x6807;&#x8BC6;&#x7B26;">2.1.1  &#x6807;&#x8BC6;&#x7B26;</h3>
<p>&#x2003;&#x2003;Java&#x5BF9;&#x5404;&#x79CD;&#x53D8;&#x91CF;&#x3001;&#x65B9;&#x6CD5;&#x548C;&#x7C7B;&#x7B49;&#x8981;&#x7D20;&#x547D;&#x540D;&#x65F6;&#x4F7F;&#x7528;&#x7684;&#x5B57;&#x7B26;&#x5E8F;&#x5217;&#x79F0;&#x4E3A;&#x6807;&#x8BC6;&#x7B26;&#x3002;</p>
<p>&#x2003;&#x2003;&#x7ED9;&#x4E00;&#x4E2A;&#x6C49;&#x65CF;&#x5C0F;&#x5B69;&#x8D77;&#x540D;&#x5B57;&#xFF0C;&#x53EF;&#x4EE5;&#x53EB;&#x201C;&#x5F20;&#x4E00;&#x4E8C;&#x4E09;&#x56DB;&#x4E94;&#x516D;&#x4E03;&#x516B;&#x201D;&#x5417;&#xFF1F;&#x6709;&#x7684;&#x4EBA;&#x4F1A;&#x56DE;&#x7B54;&#x4E0D;&#x53EF;&#x4EE5;&#x3002;&#x90A3;&#x4E3A;&#x4EC0;&#x4E48;&#x4E0D;&#x53EF;&#x4EE5;&#x5462;&#xFF1F;&#x56E0;&#x4E3A;&#x5173;&#x4E8E;&#x7ED9;&#x5C0F;&#x5B69;&#x767B;&#x8BB0;&#x59D3;&#x540D;&#xFF0C;&#x6709;&#x300A;&#x4E2D;&#x534E;&#x4EBA;&#x6C11;&#x5171;&#x548C;&#x56FD;&#x59D3;&#x540D;&#x767B;&#x8BB0;&#x6761;&#x4F8B;&#x300B;&#xFF0C;&#x5176;&#x4E2D;&#x660E;&#x786E;&#x89C4;&#x5B9A;&#xFF1A;&#x59D3;&#x540D;&#x7528;&#x5B57;&#x5E94;&#x5F53;&#x5728;2&#x4E2A;&#x6C49;&#x5B57;&#x4EE5;&#x4E0A;&#xFF0C;6&#x4E2A;&#x6C49;&#x5B57;&#x4EE5;&#x4E0B;&#xFF08;&#x6C11;&#x65CF;&#x81EA;&#x6CBB;&#x5730;&#x65B9;&#x7684;&#x81EA;&#x6CBB;&#x673A;&#x5173;&#x6216;&#x8005;&#x6C11;&#x65CF;&#x4E60;&#x4FD7;&#x5BF9;&#x59D3;&#x540D;&#x7684;&#x5B57;&#x6570;&#x6709;&#x89C4;&#x5B9A;&#x6216;&#x7EA6;&#x5B9A;&#x7684;&#xFF0C;&#x4ECE;&#x5176;&#x89C4;&#x5B9A;&#x548C;&#x7EA6;&#x5B9A;&#xFF09;&#xFF0C;&#x8FD9;&#x4E2A;&#x59D3;&#x540D;&#x8D85;&#x8FC7;&#x4E86;6&#x4E2A;&#x6C49;&#x5B57;&#xFF0C;&#x6240;&#x4EE5;&#x4E0D;&#x53EF;&#x4EE5;&#x3002;</p>
<p>&#x2003;&#x2003;&#x540C;&#x6837;&#x7684;&#x9053;&#x7406;&#xFF0C;Java&#x6807;&#x8BC6;&#x7B26;&#x6709;&#x5982;&#x4E0B;&#x547D;&#x540D;&#x89C4;&#x5219;&#x3002;</p>
<p>&#x2003;&#x2003;&#xFF08;1&#xFF09;&#x6807;&#x8BC6;&#x7B26;&#x7531;&#x5B57;&#x6BCD;&#x3001;&#x6570;&#x5B57;&#x3001;&#x4E0B;&#x5212;&#x7EBF;&#x201C;_&#x201D;&#x3001;&#x7F8E;&#x5143;&#x7B26;&#x53F7;&#x201C;$&#x201D;&#x7EC4;&#x6210;&#xFF0C;&#x5E76;&#x4E14;&#x9996;&#x5B57;&#x7B26;&#x4E0D;&#x80FD;&#x662F;&#x6570;&#x5B57;&#x3002;</p>
<p>&#x2003;&#x2003;&#xFF08;2&#xFF09;&#x4E0D;&#x80FD;&#x628A;Java&#x5173;&#x952E;&#x5B57;&#x4F5C;&#x4E3A;&#x6807;&#x8BC6;&#x7B26;&#x3002;</p>
<p>&#x2003;&#x2003;&#xFF08;3&#xFF09;&#x6807;&#x8BC6;&#x7B26;&#x6CA1;&#x6709;&#x957F;&#x5EA6;&#x9650;&#x5236;&#x3002;</p>
<p>&#x2003;&#x2003;&#xFF08;4&#xFF09;&#x6807;&#x8BC6;&#x7B26;&#x5BF9;&#x5927;&#x5C0F;&#x5199;&#x654F;&#x611F;&#x3002;</p>
<p>&#x2003;&#x2003;&#x5728;&#x4F01;&#x4E1A;&#x7684;&#x9762;&#x8BD5;&#x9898;&#x91CC;&#xFF0C;&#x5E38;&#x4F1A;&#x51FA;&#x73B0;&#x8FD9;&#x6837;&#x7684;&#x9898;&#x76EE;&#xFF0C;&#x4E0B;&#x9762;&#x7684;&#x6807;&#x8BC6;&#x7B26;&#x4E2D;&#x54EA;&#x4E9B;&#x662F;&#x975E;&#x6CD5;&#x7684;&#xFF1F; </p>
<p>&#x2003;&#x2003;stuAge&#x3001;*stuName&#x3001;$count&#x3001;3heartNum&#x3001;public&#x3001;x+y&#x3001;_carSpeed&#x3001;length10</p>
<p>&#x2003;&#x2003;stuName&#x975E;&#x6CD5;&#xFF0C;&#x539F;&#x56E0;&#x662F;&#x4E0D;&#x80FD;&#x542B;&#x201C;*&#x201D;&#xFF1B;3heartNum&#x975E;&#x6CD5;&#xFF0C;&#x539F;&#x56E0;&#x662F;&#x9996;&#x5B57;&#x7B26;&#x4E0D;&#x53EF;&#x4EE5;&#x662F;&#x6570;&#x5B57;&#xFF1B;public&#x975E;&#x6CD5;&#xFF0C;&#x539F;&#x56E0;&#x662F;&#x4E0D;&#x53EF;&#x4EE5;&#x662F;Java&#x5173;&#x952E;&#x5B57;&#xFF1B;x+y&#x975E;&#x6CD5;&#xFF0C;&#x539F;&#x56E0;&#x662F;&#x4E0D;&#x80FD;&#x542B;&#x201C;+&#x201D;&#xFF0C;&#x5176;&#x4ED6;&#x7684;&#x6807;&#x8BC6;&#x7B26;&#x90FD;&#x662F;&#x5408;&#x6CD5;&#x7684;&#x3002;</p>
<p>&#x2003;&#x2003;&#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x7A0B;&#x5E8F;&#x5458;&#xFF0C;&#x5199;&#x7684;&#x7A0B;&#x5E8F;&#x4E2D;&#x6807;&#x8BC6;&#x7B26;&#x4E0D;&#x4EC5;&#x8981;&#x5408;&#x6CD5;&#xFF0C;&#x800C;&#x4E14;&#x8981;&#x7B80;&#x77ED;&#x4E14;&#x80FD;&#x6E05;&#x695A;&#x5730;&#x8868;&#x660E;&#x542B;&#x4E49;&#xFF0C;&#x540C;&#x65F6;&#x8FD8;&#x8981;&#x7B26;&#x5408;Java&#x6807;&#x8BC6;&#x7B26;&#x7684;&#x547D;&#x540D;&#x89C4;&#x8303;&#xFF0C;&#x8FD9;&#x6837;&#x53EF;&#x4EE5;&#x8BA9;&#x7A0B;&#x5E8F;&#x89C4;&#x8303;&#x3001;&#x6613;&#x8BFB;&#x3002;&#x4E0B;&#x9762;&#x5217;&#x4E3E;&#x4E86;&#x4E0D;&#x540C;&#x7C7B;&#x578B;&#xFF08;&#x540E;&#x9762;&#x4F1A;&#x8BE6;&#x7EC6;&#x4ECB;&#x7ECD;&#xFF09;&#x7684;&#x6807;&#x8BC6;&#x7B26;&#x7684;&#x547D;&#x540D;&#x89C4;&#x5219;&#xFF0C;&#x9700;&#x8981;&#x9075;&#x7167;&#x6267;&#x884C;&#x3002;</p>
<ul>
<li><p>&#x5BF9;&#x4E8E;&#x53D8;&#x91CF;&#x548C;&#x65B9;&#x6CD5;&#x540D;&#xFF0C;&#x8981;&#x6C42;&#x7B2C;&#x4E00;&#x4E2A;&#x5355;&#x8BCD;&#x5E94;&#x4EE5;&#x5C0F;&#x5199;&#x5B57;&#x6BCD;&#x4F5C;&#x4E3A;&#x5F00;&#x5934;&#xFF0C;&#x540E;&#x9762;&#x7684;&#x6BCF;&#x4E2A;&#x5355;&#x8BCD;&#x5219;&#x90FD;&#x8981;&#x4EE5;&#x5927;&#x5199;&#x5B57;&#x6BCD;&#x5F00;&#x5934;&#xFF0C;&#x4F8B;&#x5982;stuAge&#x3001;sendMessage&#x3002;</p>
</li>
<li><p>&#x5BF9;&#x4E8E;&#x7C7B;&#x540D;&#xFF0C;&#x5B83;&#x548C;&#x53D8;&#x91CF;&#x540D;&#x3001;&#x65B9;&#x6CD5;&#x540D;&#x7684;&#x533A;&#x522B;&#x5728;&#x4E8E;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x5355;&#x8BCD;&#x7684;&#x9996;&#x5B57;&#x6BCD;&#x4E5F;&#x9700;&#x8981;&#x5927;&#x5199;&#xFF0C;&#x5982;&#x679C;&#x7C7B;&#x540D;&#x79F0;&#x4E2D;&#x5305;&#x542B;&#x5355;&#x8BCD;&#x7F29;&#x5199;&#xFF0C;&#x5219;&#x8FD9;&#x4E2A;&#x7F29;&#x5199;&#x8BCD;&#x7684;&#x6BCF;&#x4E2A;&#x5B57;&#x6BCD;&#x5747;&#x5E94;&#x5927;&#x5199;&#xFF0C;&#x4F8B;&#x5982;XMLModule&#x3002;&#x53E6;&#x5916;&#xFF0C;&#x7531;&#x4E8E;&#x7C7B;&#x662F;&#x8BBE;&#x8BA1;&#x7528;&#x6765;&#x4EE3;&#x8868;&#x5BF9;&#x8C61;&#x7684;&#xFF0C;&#x6240;&#x4EE5;&#x5728;&#x547D;&#x540D;&#x7C7B;&#x65F6;&#x5E94;&#x5C3D;&#x91CF;&#x9009;&#x62E9;&#x540D;&#x8BCD;&#x3002;</p>
</li>
<li><p>&#x5E38;&#x91CF;&#x6807;&#x8BC6;&#x7B26;&#x5E94;&#x8BE5;&#x90FD;&#x4F7F;&#x7528;&#x5927;&#x5199;&#x5B57;&#x6BCD;&#xFF0C;&#x5E76;&#x4E14;&#x6307;&#x51FA;&#x8BE5;&#x5E38;&#x91CF;&#x5B8C;&#x6574;&#x7684;&#x542B;&#x4E49;&#x3002;&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x5E38;&#x91CF;&#x540D;&#x79F0;&#x7531;&#x591A;&#x4E2A;&#x5355;&#x8BCD;&#x7EC4;&#x6210;&#xFF0C;&#x5219;&#x5E94;&#x8BE5;&#x7528;&#x4E0B;&#x5212;&#x7EBF;&#x6765;&#x5206;&#x5272;&#x8FD9;&#x4E9B;&#x5355;&#x8BCD;&#xFF0C;&#x4F8B;&#x5982;MAX_VALUE&#x3002;</p>
</li>
</ul>
<h3 id="212--&#x5173;&#x952E;&#x5B57;">2.1.2  &#x5173;&#x952E;&#x5B57;</h3>
<p>&#x2003;&#x2003;Java&#x5173;&#x952E;&#x5B57;&#x5BF9;Java&#x7F16;&#x8BD1;&#x5668;&#x6709;&#x7279;&#x6B8A;&#x7684;&#x610F;&#x4E49;&#xFF0C;&#x5B83;&#x4EEC;&#x7528;&#x6765;&#x8868;&#x793A;&#x4E00;&#x79CD;&#x6570;&#x636E;&#x7C7B;&#x578B;&#x6216;&#x8005;&#x8868;&#x793A;&#x7A0B;&#x5E8F;&#x7684;&#x7ED3;&#x6784;&#x7B49;&#xFF0C;&#x5173;&#x952E;&#x5B57;&#x4E0D;&#x80FD;&#x7528;&#x4F5C;&#x53D8;&#x91CF;&#x540D;&#x3001;&#x65B9;&#x6CD5;&#x540D;&#x3001;&#x7C7B;&#x540D;&#x548C;&#x5305;&#x540D;&#x3002;</p>
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<p>&#x2003;&#x2003;Java&#x7684;&#x5173;&#x952E;&#x5B57;&#x90FD;&#x662F;&#x5C0F;&#x5199;&#x7684;&#x82F1;&#x6587;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;goto&#x8FD9;&#x4E2A;&#x6807;&#x8BC6;&#x7B26;&#x867D;&#x7136;&#x4ECE;&#x4E0D;&#x4F7F;&#x7528;&#xFF0C;&#x4F46;&#x4E5F;&#x4F5C;&#x4E3A;Java&#x4FDD;&#x7559;&#x5B57;&#x8FDB;&#x884C;&#x4FDD;&#x7559;&#xFF0C;&#x9700;&#x8981;&#x6CE8;&#x610F;&#x3002;&#x56FE;2.1&#x5217;&#x51FA;&#x4E86;&#x6240;&#x6709;&#x7684;Java&#x5173;&#x952E;&#x5B57;&#x3002;</p>
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<center>&#x56FE;2.1  Java&#x5173;&#x952E;&#x5B57;</center>  

                                
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